JPH07150592A - Counter weight device - Google Patents

Abstract

PURPOSE:To stabilize a balance of a car body, and enhance a maintenance characteristic of illuminating lamps by arranging an additional weight projecting outside from an outer peripheral surface of a counter weight, and opening and boring window holes in an additional weight part corresponding to a position of the illuminating lamps. CONSTITUTION:An additional weight 8 is projected outside by a prescribed dimension from an outer peripheral surface of a counter weight 7 over to a rear surface from a side surface of the counter weight 7, and the vicinity of a central outer peripheral surface part of the additional weight 8 is made diametrically slightly larger than a rear end turning radius of an upper turning body 5. Window holes 14 and 15 for illuminating lamps 11 and 12 are formed in the additional weight 8, and a peripheral part of the illuminating lamps 11 and 12 is covered. Thereby, when the vicinity of a part of the illuminating lamps 11 and 12 is collided with the other obstacle at turning time or retreat time of a hydraulic shovel, damage of the illuminating lamps 11 and 12 can be prevented, and mounting and demounting of a material of the additional weight 8 can be also selected according to a work condition of the hydraulic shovel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight device mounted on construction machines such as hydraulic excavators and work vehicles.

[0002]

2. Description of the Related Art FIG. 8 is a rear perspective view of an upper revolving structure 1 of a hydraulic excavator described in Japanese Utility Model Laid-Open No. 3-99065. In the hydraulic excavator shown in FIG. 8, a counterweight 3 is provided at a lower edge portion on the rear side of the bonnet 2, and protectors 4 also serving as balance weights are arranged at both edge portions of the bonnet 2.

[0003]

Conventionally, in hydraulic excavators, additional weights are attached in order to stabilize the vehicle body balance during work. However, in recent hydraulic excavators, the outer peripheral surface on the rear surface of the counterweight is formed into a curved surface that extends vertically and horizontally, and at the left and right corners on the rear surface side of the counterweight, a turning warning illumination device called a turning flasher, a rear work light, etc. Is provided. Therefore, it is difficult to attach an additional weight around the counterweight so as not to spoil its aesthetic appearance.
Further, when the hydraulic excavator turns or retreats, the turning flasher and the rear work light often collide with other obstacles to be damaged. An object of the present invention is to provide a counterweight device that can solve the above problems.

[0004]

In the counterweight device of the present invention, a counterweight is provided at the rear of the vehicle body,
In a construction machine, a work vehicle, etc. having illumination lights at the left and right corners of the rear surface of the counterweight, an additional weight protruding outward from the outer peripheral surface of the counterweight is provided from the side surface to the rear surface of the counterweight, and the counterweight is provided. The additional weight portion corresponding to the position of the illuminating lamp arranged on the weight is formed by opening a window hole. Further, the additional weight is detachably attached to the counterweight. Further, a lens guard plate having an irradiation light hole of an illuminating lamp or a lens guard plate made of a transparent hard synthetic resin material is attached to the window of the additional weight.

[0005]

In the counterweight apparatus of the present invention, the additional weight is projected outward from the side surface of the counterweight to the rear surface by the dimension l from the outer peripheral surface of the counterweight. The diameter is slightly larger than the turning radius of the rear end of the body. Moreover, since the additional weight is provided with the window hole for the illumination lamp, the periphery of the portion of the illumination lamp can be covered. Therefore, when the vicinity of the illumination lamp collides with other obstacles when the hydraulic excavator turns or moves backward, the illumination lamp can be prevented from being damaged. Further, as the material of the additional weight, a heavy material having a large specific gravity such as cast iron material is used, and the additional weight can be selected for attachment / detachment according to the working situation.
Further, since a lens guard plate having a plurality of irradiation light holes opened or a lens guard plate made of a transparent hard synthetic resin material is attached to the window hole of the additional weight, for example, a rod-shaped other obstacle is the above-mentioned window. Even if it comes into contact with the hole portion, the presence of the lens guard plate can prevent the illumination lamp from being damaged.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an overall side view of a hydraulic excavator equipped with the counterweight device of the present invention. In the figure,
5 is an upper revolving structure which is the body of the hydraulic excavator, 6 is a lower traveling structure, 7 is a counterweight mounted on the rear part of the upper revolving structure 5, 8 is an additional weight attached to the counterweight 7, and 9 is an upper revolving structure. The work attachment is attached to the front part of the body 5. FIG. 2 is a detailed view of part A of FIG. In the figure, 11 and 12 are illumination lights (specifically, the illumination light 11 is a turning warning illumination light, and
2 is a rear work light), and 14 and 15 are additional weights 8.
The reference numeral 16 denotes a window hole formed in the counter weight 7, 16 is a bolt for tightening and fixing the additional weight 8 to the counterweight 7, and 17 is a counterbore hole portion for the bolt 16 formed in the additional weight 8. FIG. 3 is a perspective view of essential parts of a hydraulic excavator equipped with the counterweight device of the present invention. In the figure, 19 is a guard on the outer peripheral surface of the upper swing body 5. Although the additional weights 8 are symmetrically provided on the left and right sides, the additional weight 8 on the right side cannot be seen in FIG. FIG. 4 is a cross-sectional view of the main part as seen from BB of FIG. FIG. 5 is a side view of essential parts showing the hydraulic excavator with the additional weight 8 removed. In the figure,
Reference numeral 10 is a bumper member attached to a portion where the additional weight 8 is removed.

FIG. 6 is a cross-sectional view of essential parts showing a state in which the lens guard plate 20 is attached to the window holes 14 and 15 of the additional weight 8 according to the present invention. In the figure, reference numeral 21 denotes a plurality of irradiation light holes opened in the lens guard plate 20. Figure 7
FIG. 7 is a cross-sectional view of the main part viewed from CC in FIG. 6. In the figure, 22 is a fixture for attaching the lens guard plate 20 to the window hole 14 of the additional weight 8, and 23 is a fixture 22.
Is a bolt for tightening and fixing to the additional weight 8.

Next, the structure of the counterweight device of the present invention will be described with reference to FIGS. According to the present invention, the additional weight 8 is provided from the side surface of the counterweight 7 to the rear surface thereof so as to project outward from the outer peripheral surface B of the counterweight 7 (shown in FIG. 4) by the dimension l, and is arranged on the counterweight 7. The additional weight 8 corresponding to the positions of the illuminating lamps 11 and 12 was constructed by opening window holes 14 and 15. The additional weight 8 is detachably attached to the counterweight 7 by tightening bolts 16. Further, the lens guard plate 20 in which the irradiation light holes 21 of the illumination lamps 11 and 12 are opened in the window holes 14 and 15 of the additional weight 8 or the lens guard plate formed of a synthetic resin material such as transparent hard polycarbonate ( A lens guard plate made of synthetic resin (not shown) is attached.

Next, the operation of the counterweight device of the present invention will be described. In the present invention, the additional weight 8 is projected outward from the outer surface of the counterweight 7 by the dimension l (shown in FIG. 4) from the side surface to the rear surface of the counterweight 7. The diameter is slightly larger than the rear end turning radius (not shown) of the turning body 5. Moreover, the additional weight 8 and the lighting 1
Since the window holes 14 and 15 for 1 and 12 are formed,
It was possible to cover the circumference of the 1,2 part. Therefore, when turning or retreating the hydraulic excavator, the illumination lights 11, 12
When the vicinity of the area is collided with another obstacle,
It is possible to prevent the damage of 1 and 12. Further, as the material of the additional weight 8, a heavy material having a large specific gravity such as cast iron material is used, but the additional weight 8 can be selected to be attached or detached in accordance with the working situation of the hydraulic excavator.

The window holes 14, 15 of the additional weight 8 are also provided.
Since the lens guard plate 20 is attached to, even if another bar-shaped obstacle comes into contact with the window holes 14 and 15,
The presence of the lens guard plate 20 can prevent the illumination lamps 11 and 12 from being damaged. Since the lens guard plate 20 is formed with a plurality of irradiation light holes 21, the illumination lamp 1
When the lamps 1 and 12 are turned on, irradiation can be performed through the plurality of irradiation light holes 21. In addition, in the additional weight 8 with a transparent hard lens guard plate attached, the illumination lamp 11,
It is possible to act as a guard against other obstacles without blocking the irradiation light of 12.

[0011]

In recent hydraulic excavators, the outer peripheral surface on the rear surface of the counterweight is formed into a curved surface extending vertically and horizontally, and a turning warning illumination device called a turning flasher is provided at the left and right corners on the rear surface of the counterweight. A rear work light is provided. Therefore, it is difficult to attach an additional weight around the counterweight so as not to spoil its aesthetic appearance. However, in the counterweight device of the present invention, the additional weight is projected outward from the side surface of the counterweight to the rear surface by the dimension l from the outer peripheral surface of the counterweight. The diameter is slightly larger than the rear end turning radius. Moreover, since the additional weight is provided with the window hole for the illumination lamp, the periphery of the portion of the illumination lamp can be covered. Therefore, when the vicinity of the illumination lamp collides with other obstacles when the hydraulic excavator turns or moves backward, the illumination lamp can be prevented from being damaged. Further, as the material of the additional weight, a heavy material having a large specific gravity such as cast iron material is used, and the additional weight can be selected for attachment / detachment according to the working situation. Further, since a lens guard plate having a plurality of irradiation light holes opened or a lens guard plate made of a transparent hard synthetic resin material is attached to the window hole of the additional weight, for example, a rod-shaped other obstacle is the above-mentioned window. Even if it comes into contact with the hole portion, the presence of the lens guard plate can prevent the illumination lamp from being damaged. Therefore, in the counterweight device of the present invention, it is possible to attach a good-looking additional weight to stabilize the balance of the vehicle body, and also to improve the maintainability of the illumination lamps arranged on the counterweight.

[Brief description of drawings]

FIG. 1 is an overall side view of a hydraulic excavator equipped with a counterweight device of the present invention.

FIG. 2 is a detailed view of part A of FIG.

FIG. 3 is a perspective view of a main part of a hydraulic excavator equipped with the counterweight device of the present invention.

FIG. 4 is a cross-sectional view of a main part seen from BB of FIG.

FIG. 5 is a side view of essential parts showing the hydraulic excavator in a state in which the additional weight according to the present invention is removed.

FIG. 6 is a side view of essential parts showing a state in which a lens guard plate is attached to a window hole of an additional weight according to the present invention.

FIG. 7 is a cross-sectional view of a main part viewed from CC of FIG.

FIG. 8 is a rear perspective view of an upper revolving structure of a conventional hydraulic excavator.

[Explanation of symbols]

 1,5 Upper revolving structure 3,7 Counterweight 6 Lower traveling structure 11,12 Illumination lamp 14,15 Window hole 16,23 Bolt 20 Lens guard plate 21 Irradiation light hole 22 Attachment

Claims (4)

[Claims] 1. A construction machine, work vehicle, etc., in which a counterweight is provided on a rear portion of a vehicle body, and illumination lights are provided at right and left corners of a rear surface portion of the counterweight, the counterweight extending from a side surface to a rear surface of the counterweight. The counterweight device is characterized in that an additional weight projecting outward from the outer peripheral surface of the counterweight is provided, and a window hole is opened in a portion of the additional weight corresponding to the position of the illumination lamp arranged in the counterweight. . 2. The counterweight device according to claim 1, wherein an additional weight is detachably attached to the counterweight. 3. The counterweight device according to claim 1, wherein a lens guard plate having an irradiation light hole of an illumination lamp is attached to a window hole of the additional weight. . 4. The counterweight device according to claim 1, wherein a lens guard plate made of a transparent hard synthetic resin material is attached to a window hole of the additional weight. .